Dockerized Attic receiver

Attic is a fantastic piece of backup software. Instead of having to re-write your own backup script all the time, you can just tap into Attic and get other nice features like retention policies and de-duplication.

By default, Attic support SSH targets, which is awesome. However, if you're backing up a production server, you probably do not want to grant it proper shell access to the SSH target. This Docker container solves that.

Usage

Create the server

Here's an example of a container setup on the remote server.

$ docker run -d \
    -v /etc/ssh:/etc/ssh:ro \
    -v /path/to/vault:/home/attic/vault \
    --name attic \
    -e "SSHKEY=Your public ssh key" \
    --restart always \
    -p 2222:22 \
    vpetersson/attic

This will:

• Use the host's ssh folder (/etc/ssh) such that the SSH host keys remain the same
• Map the local folder /path/to/vault to /home/attic/vault in the container (this is where you store your backups)
• Install the SSH key provided for the user attic into the container
• Make the container listen on port 2222

If you need to inject multiple SSH keys, simply separate them with '\n'.

Create a backup

With the container up and running, you can initiate your vault as follows:

$ attic init ssh://attic@your-server:2222/home/attic/vault/repository.attic